🏷️ Basic Information Identification Make: Harley-Davidson Model: FLSTF Fat Boy Year: 2004 Sub Model: ST Codes Engine Family: Twin Cam 88B 👋 Introduction Market Position Positioning: Crucial resource for owners and technicians of the iconic Harley-Davidson FLSTF Fat Boy, offering in-depth maintenance and repair capabilities. Competitive Analysis Value Proposition: Provides professional-level technical information that would otherwise require expensive dealership labor or specialized knowledge. Key Features Comprehensiveness: Covers all aspects of the motorcycle, ensuring a complete understanding for any service task. Accessibility: PDF format allows for easy searching, printing of specific sections, and access on various devices. 📋 Manual Details Coverage Areas Coverage: All modifications and components for the 2004 Harley-Davidson FLSTF Fat Boy ST Page Count Page Count: Estimated 500+ Manual Type Manual Type: Workshop Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Twin Cam 88B, including disassembly, assembly, inspection, and specifications Fuel System: Carburetor (CV), fuel injection (if applicable to specific variant), fuel tank, fuel pump, fuel lines Ignition System: Ignition module, coils, spark plugs, wiring Transmission: 5-speed Cruise Drive transmission, clutch, primary drive, final drive Brakes: Front and rear brake systems, calipers, master cylinders, brake lines, hydraulic fluid Suspension: Front fork (telescopic), rear shock absorbers, swingarm Electrical System: Wiring diagrams, lighting, starting system, charging system, battery, switches, instruments Chassis And Frame: Frame, steering head, wheels, tires, bearings Bodywork: Fenders, fuel tank, seat, handlebars, controls, exhaust system Diagnostics: Troubleshooting guides for common issues, fault codes (if applicable) Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, lubrication Repair: Engine rebuild, transmission overhaul, brake system repair, suspension servicing Troubleshooting: Systematic approach to identifying and resolving mechanical and electrical issues Disassembly Assembly: Step-by-step instructions for component removal and installation Wiring Diagrams: Detailed electrical schematics for all circuits Specifications: Torque values, clearances, fluid capacities, wear limits Technical Depth Depth: Comprehensive, covering routine maintenance to complete engine and transmission rebuilds 📊 Manual Specifications File Format File Format: PDF Print Quality Searchable: Yes Printable: Yes Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, Twin Cam 88B V-twin Displacement: 1450cc (88 cubic inches) Bore X Stroke: 3.75 in. x 4.00 in. (95.25 mm x 101.6 mm) Compression Ratio: 8.8:1 (typical) Performance Horsepower: Approx. 65-70 HP (at crankshaft, stock tuning) Torque: Approx. 78-85 ft-lbs (at crankshaft, stock tuning) Fuel System Carburetor: Keihin CV 40mm (Constant Velocity) Fuel Type: Unleaded gasoline, minimum 91 octane 🔧 Transmission Standard Type: 5-speed Cruise Drive Primary Drive: Duplex chain, 34/46 ratio (1.353:1) Final Drive: Belt, 32/66 ratio (2.0625:1) Features Clutch Type: Wet, multi-plate, hydraulic actuation Transmission Fluid Type: Harley-Davidson Formula+ (or equivalent GL-4, 75W-85/75W-90 transmission fluid) Primary Chain Tensioner: Hydraulic 📐 Dimensions Exterior Length: Approx. 93.3 in. (2370 mm) Width: Approx. 37.2 in. (945 mm) Height: Approx. 48.5 in. (1232 mm) Wheelbase: Approx. 64.5 in. (1638 mm) Weights Dry Weight: Approx. 670 lbs (304 kg) Gross Vehicle Weight Rating: Approx. 1030 lbs (467 kg) Cargo Fuel Tank Capacity: 4.0 US gallons (15.1 L) 🛡️ Safety Features Ratings Crash Test Results: Not applicable for motorcycles in traditional automotive sense. Active Features Brakes: Dual-piston caliper front and rear brakes. Lighting: Halogen headlight, LED tail/brake light, bullet turn signals. Passive Features Frame Construction: Steel, rigid backbone, dual downtube frame for stability. 💡 Technology Features Infotainment Stock System: Basic analog instrumentation (speedometer, tachometer, fuel gauge, oil pressure gauge). No integrated infotainment system on this model. Driver Assistance Features: None standard on this model year; focused on traditional riding experience. Connectivity Features: None standard; typically after-market solutions for communication or GPS. 🔧 Maintenance Service Intervals First Service: 1000 miles (1600 km) or 6 months Subsequent Service: Every 5000 miles (8000 km) or 12 months thereafter Fluid Specifications Engine Oil Type: Harley-Davidson SYN3 (Synthetic) or equivalent SAE 20W-50 motorcycle oil Engine Oil Capacity: Approx. 4.0 US quarts (3.8 L) with filter change Primary Chain Case Fluid: Harley-Davidson Formula+ or SAE 75W-90 gear oil (API GL-4) Primary Chain Case Fluid Capacity: Approx. 1.0 US quart (0.95 L) Brake Fluid Type: DOT 4 hydraulic brake fluid Fork Oil Type: Refer to manual for specific weight and type (often Harley-Davidson suspension fluid or a good quality 5W-10W fork oil) Known Issues Cam Chain Tensioners: Early Twin Cam models (pre-2007) used plastic cam chain tensioners that could wear and fail, potentially leading to engine damage. Hydraulic tensioners introduced later are more robust. This manual will detail inspection and replacement procedures. Oil Leaks: Potential for oil leaks from primary cover, rocker boxes, and transmission seals due to aging gaskets and seals. Manual covers gasket replacement. Carburetor Tuning: CV carburetor can require periodic adjustments and cleaning for optimal performance. Manual provides tuning guidelines. 📚 Vehicle History Brand Heritage Legacy: Harley-Davidson has a rich history dating back to 1903, synonymous...